Radiator



G. H. PHELPS RADIATOR Original Filed Jan. 26, 1928 2 SheetsSheet 1 myd G'EORGEH B15411);

Jan. 19, 1932. H. PHELPS RADIATOR 2 Sheets-Sheet 2 Original Filed Jan. 26, 1928 Gav/F0515. PHELPS.

Gwen V0136 'or' quite impracticablebecause :of the rapid Patented Jan. 19, 1932 VQ' GEORGE n. Pam's, or wanmousnronrr,conundrum i amma Original application m January 2s, 192s, senauio. i e 1929. Serial- In certain previous applications, particularly those of Murray and Bennett Nos. 203,- 437 and 203,438 (Patent No. 1,750,643, March 18, 1930) ,filed July 5, 1927,;there-is described '5 a radiator comprising a steam pipe or other heating element and a radiating structure of sheet metal applied thereto by means of sup-' plementary straps Welded to each other through the sheet metal. v o In my application No. 249',53 8,filedJanuary 26, 1928, there is described aradiatorand a Welded jointand methodwhichare'par ticularly useful inf ma'king such radiators.

The present application is a division of my 15, application 249,538.

' The accompanyingdrawings illustrate em: bodiments oftheinvention. Fig. 1 is a side elevation of the end of a radiator; i

Fig; 2 is a plan of the same; Fig. 3 isa vertical section through the joints of Fig; 1;' Fig. 4 is a similar section through a joint! of an alternative style of radiator Fig; 5 is a face view of'an endof oneof the Fig. 6 is-a longitudinal section of the parts before Welding; I n Fig. 7 is a cross-section of the sameon the line 77 ofFig.6; I Fig. '8 is a View similar 'to 'Fig 3 of an; alternative construction; I I

Fig.9 is a section on the line, 9- 9 of FiggS; Fig. 10 is a sectionsimilar to Fig. 3 of an alternative construction; r Fig. 11 is-asection similar-to Fig. 6'illus-' trating a modification." J

' "Fig. ,1 illustrates the application"to aisteamj 46 pipe 1 of a radiating structure comprising. metal sheets corrugated to form laterally exa tending fins 2, slightly oblique, andlongione of tudinally extending portions 3 Which are bent p p 7 p p 7 H I V ,of elding proposed; Th6 straps are punchedto form; short tubular projections 8 and 9' with squared edges" Whichfmake .a butt I [Weld 'ivhen pressed between electrodes {and j 1 ----heated"bythe current. Oneothe tubular} V projections, as provided with a flat fa'ceand j the otlier iwith a [conical point orpil'ot 111 vwhich enters the}othei projection when"; the 1010 g I outwardly at intervals to'formrecesses em bracing thepipe 1 between them, The pipe "and the corrugated plates are preferably cop-f per or aluminum or other metals oralloys of comparatively high electrical a-nd heat cond ti ity & 5 1W7 The spot'weldingof' such metals is almost the plates.

249,538. Divided and this application ma mm,-

No. 369,622. I a

conduction of the current and the heat from the points to be joined as Well as the-high "electrical conductivity ofthe metalitself;

This difficulty is avoided; according tosthe inventions of the, above cited appl cations,';

by theapplication of-Welding straps- 5 of steel or ferrousmetal, and the present'invention provides an improved means for Welding such straps. The straps are provided I r sheet around the pipe and are Welded together i 1 to form joints indicated asa Whole bythe I numeral- 7 between the Opp site straps 5 and with recesses '6 which embrace the copper extendiiig'throughth'eplates Accordingjto my previous. application the sheets 3 and the straps o were pressed to-( "gether betweenelectrodes while passinga current so that the sheets becamealloyed with" or dissolved into the steel of the straps;

In I applying the presentimprovement to such radiators the sheets 3 are provided with 1 holes through whichfportions of the straps extend and'are welded to each-other. "Fig; '3 I 5 showsfthe plates3 united by straps fi yvith weldecljoints 7 passing through openings-in F 4 shows a similar method of attachinga'single copper plate 3to a ipe 5 other at 7 :1. 'The"copperplate is recessed at 4 tOQeX-fl' tendpartially around the pipe;- Steel straps 5 are placed in position and Weldedftoeach; K through holes inthe single copper Withthis method thestraps'fi need: not be f ofsteel. Theyma-y be oii other metals, such as brass or evencopperuvsince during the heating. period the, strapsarefnowhere in intimate contact with anything but the elec 'trodesea'nd each otheri (s'ee Fig. 6), there is. no reasonywhythe straps cannot be made of any material which can be formed. to the de .sired shapea'ndv'vhich can'bje buttwelded. T.

Figs; 5,6 and 7'show the particular method.

machine by the lateral engagement of the point 11 in the opposite projection.

The methods described straps to other parts analogous to the copper sheets without the inclusion of the pipe and in. various other structures than radiators. For radiators (as well as other structures) the straps and the welding projections which pass through the sheet or sheets may be ViLI'l uosly shaped.

In Figs. 8 and 9, for example, the straps are in the form of half rings 12, the ends of which are reduced and passed through openingsin the sheets 3 and butt welded to form ties. 13. V V

The same method of welding may be applied directly to the sheets, without the use of supplementary straps. Fig. 10 shows such a construction with sheets 14 having recesses 15 which embrace the pipe 1, the sheets having projections on their adjacent faces wh ch are weldedtogether to provide ties 16. This involves a space between the opposed sheets which is determined by theregulating of the size of the proj ectionsand the take-up during the welding operation. Such a construction is particularly useful in making radiators with fins or other radiating structure of steel or similar metal. Fig. 11 is a section similar to Fig. 6 111 which the projections 8 and 9 are simple tubular proj eetions with squared ends abutt ng against each other. This type of pro ection is used where other means are provided for holding the straps in proper register during the welding. operation- The projections may be of. various shapes, sizes andlocations according to the metal and the'character of the work. Andin the welding of two piecesto each other through a hole in one-or more intermediate pieces, projections may be used on only one instead of both of the two outer pieces. 1 3

For radiators, this style of joint has par ticular advantages over soldering, clamping and similar methods previously used forattaching fins or radiating structures to steam or hot water. pipes or to electric heating elements. In the use of such radiators the alternate expansion and contraction of the heating element causes a great strain on the joints between the pipe and the radiating structure and may in time destroy the inti aoove maybe used also for uniting parts analogous to the steel mate connection which is important in scour ing arapid transfer of heat. Some such methods of uniting the heating elements and the radiating structure are also tedious and therefore expensive.

The joints of the present invention can be made, all or in large groups, at one machine operation so as to be quite economical. And they hold the parts together unyieldingly and at the same time stiffen th-e tubes and the radiating plates so as to permit the making of theseof the desired thin metal and of such comparatively soft metals as the desired fhigh conductive copper and the like.

There is a peculiar advantage also in the =use of straps of steel (in which term I include ferrous metals generally) where the heating element or the radiating structureor both are of copper (in which term'I include cuprous metals generally) The higher coeflicient of thermal-expansion of the copper results in a greater enlargement of the latter as the temperature is raised so that it expands to a greater extent than the steel and increases ,the intimacy of contact with the radiating struetureand thus increases the conductivity of. the joint.

The comparatively slight expansion of the steelwill be within. its elastic limit so that when the radiator is cooled the steel will return to its original dimensions and will grip the parts together with its original efficieney. 7 I

Radiators of this type are particularly useful for heating the air of a room. The heat is transmitted through the-corrugated plates to the adjacent air. The vertical passages provided bythe corrugated platesform a sort of flue in which there is induced a comparatively high velocity of the heated air so that it is rapidly circulated through the room and returned to the lower ends of such passages.

The same type of radiator may be used for cooling the air by circulating cold brine or the like through the tube and may be used in refrigerating and similar apparatus for various analogous purposes.

p The term straps: is'used herein to designate extra pieces ofmetal applied to the sheet metal radiating structure, either-in the nection with othermeans for securing the parts together with a good heat conducting relation to each other. 7

Various modifications may be made by those skilled in the art without departing from the invention as defined in the followingclaims. a

1.v A radiator comprising a heating element and alradiating structure of sheet metal applied thereto by means of supplementary straps united directly to each other through openings in the sheet .metal at points beyond the heating element so as tohold the parts in close heat conducting relation with each other. a a v V 2. A radiator comprising a heating 'element and a radiating structure of sheet metal applied thereto bymeans of supplementary A straps having projections united to each other through holes in the sheet metal.

3, A radiator comprising a heating element and a radiating structure of sheetmeta-l applied thereto by means of supplementary straps having projections passing through holes'in the sheet metalland welded to each other. v 1

4. A radiator comprising a horizontally extended heating element in combination with a radiating structure providing air flues'ex-f 2o tending in' a substantially vertical, direction 7 V enclosed at the sides, said radiating structure held in intimate contact by two additional straps placed around a portion of the radiating structure and secured one to the 1 other through openings in the radiating structure at points close to the heating ele-' ment. U l

5; A radiator comprising a horizontally extended heating element in combination with a radiating structure providing air fiues.

extendingin a substantially vertical direc- V 7 tion enclosed at the sides, said radiating structure-held in intimate contact by two additional straps placed around a portion of the. V II radiating structure andwelded one to the other through openings in the" radiating structure at points close to the heating .ele-

ment. 7 I V- '1 a 6. A radiator comprising aheatingelement and a radiating structure applied thereto-by means of supplementary strapsvunit'ed to each )ther through openingsin the radiating structure, the straps being of metal of a coeflicient of thermal'expansion which is less than that of the heating element.

. 7 A radiator comprising a heating element and a radiating structure of sheet metal applied thereto and recessed to embrace the heating element and supplementary straps V p engaging the recessed portions of said sheet metal extendingbeyond the same and unit-ed directly to each other through openingsin the sheet metal at points beyond the heating element so as to hold the parts inclose heat conducting relation to each other; I 1

In Witness whereof, I have hereunto signed 1nyname. r V V v 1 GEORGE rH LPs. 

